CN202307495U

CN202307495U - Shapable Rogowski coil transformer

Info

Publication number: CN202307495U
Application number: CN2011203963099U
Authority: CN
Inventors: 李云宏; 吴柏胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-18
Filing date: 2011-10-18
Publication date: 2012-07-04
Anticipated expiration: 2021-10-18

Abstract

The utility model relates to a shapable Rogowski coil transformer. The transformer (5) comprises a framework (1), wherein the framework (1) is made of a metal material; one or more layers of enameled wire (2) are spirally wound on the framework (1); a protection sleeve (3) coats the enameled wire (2); and leading-out wires (4) at two ends of the enameled wire (2) are positioned at the two ends or the same end of the transformer (5). A measuring method comprises the following steps of: winding the transformer (5) on a measured conductor (6) in a multi-circle mode; and tightly contacting the transformer (5) and the measured conductor (6). By adoption of the shapable Rogowski coil transformer and the measuring method, measuring accuracy can be improved.

Description

Plastic form Luo-coil instrument transformer

Technical field

The utility model relates to a kind of plastic form Luo-coil instrument transformer.

Background technology

At present; The main body of Luo-coil instrument transformer includes skeleton and gets coil on the skeleton with being wrapped in; Conventional Luo-coil instrument transformer is because its skeleton is fixed form (like patent DE20080180U1); Thereby often can't fit tightly with measured conductor; Especially when measured conductor when being irregularly shaped, just have the space between Luo-coil instrument transformer and the measured conductor, extraneous like this magnetic disturbance just can be passed Luo-coil influence the output accuracy of Luo-coil, make current measurement interference increase;

For this reason; Chinese patent ZL03223044.3 has announced a kind of " Flexible transformer ", and its improvement is that skeleton adopts flexible material, but since flexible material is only flexible can not be moulding; After being wound in measured conductor; The Luo-coil instrument transformer can not keep solid shape, and its pitch of the laps diameter and pitch of the laps shape can change with vibrations, pressure, variation of temperature, precision and stability that influence is measured;

Simultaneously, conventional Luo-coil is looped around around the measured conductor all with a circle; Owing to receive the number of turn restriction of coiling enamelled wire; The number of turn of enamelled wire few otherwise the circle diameter big, so the voltage signal that induces very a little less than, disturb very big; Make that the range of linearity is very little, almost can't measure less than the electric current of 100A.

Summary of the invention

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of plastic form Luo-coil instrument transformer and method of measurement thereof that can improve certainty of measurement is provided.

The purpose of the utility model is achieved in that a kind of plastic form Luo-coil instrument transformer; Said instrument transformer includes skeleton; It is characterized in that: spiral is wound with enamelled wire on the said skeleton, and said enamelled wire is wound with one or more layers, and said enamelled wire has wrapped protective sleeve outward.

A kind of plastic form Luo-coil instrument transformer of the utility model, it is characterized in that: said skeleton is a metal material.

A kind of plastic form Luo-coil instrument transformer of the utility model, it is characterized in that: the lead-out wire at said enamelled wire two ends is positioned at the two ends or the same end of instrument transformer.

A kind of plastic form Luo-coil instrument transformer of the utility model, it is characterized in that: said skeleton is copper core cable, aluminium cable line, copper cash, aluminum steel or alloy wire.

Compared with prior art, the beneficial effect of the utility model is:

After the method for measurement that the mode of employing enamelled wire sandwich wound and instrument transformer enclose coiling more; The utility model Luo-coil instrument transformer can accurately be measured any alternating current and the pulse current more than 0.5 ampere; Be equipped with its exact value of integrating circuit and can reach 2 ‰; Enlarged the range of linearity of measuring widely, the range of linearity can reach 0.5A-∞, the feasible little electric current of instrument transformer energy measurement with the Luo-coil principle.

Description of drawings

Fig. 1 draws the structural representation of lead with end for the plastic form Luo-coil of the utility model instrument transformer.

Fig. 2 draws the structural representation of lead for the plastic form Luo-coil of the utility model instrument transformer two ends.

Application state sketch map when Fig. 3 draws lead for the plastic form Luo-coil of the utility model instrument transformer with end.

Fig. 4 is the application state sketch map of the plastic form Luo-coil of the utility model instrument transformer two ends when drawing lead.

Wherein:

Skeleton 1, enamelled wire 2, protective sleeve 3, lead-out wire 4, instrument transformer 5, measured conductor 6.

Embodiment

Referring to Fig. 1 ~ 4; A kind of plastic form Luo-coil instrument transformer that the utility model relates to, said instrument transformer 5 includes skeleton 1, and said skeleton 1 is a metal material; Said skeleton 1 also can use copper core cable, aluminium cable line, copper cash, aluminum steel or alloy wire; Spiral is wound with enamelled wire 2 on the said skeleton 1, and said enamelled wire 2 is wound with one or more layers, when adopting the multilayer mode; Can under the prerequisite that does not increase instrument transformer circle footpath, increase the coiling number of turn of enamelled wire; Wrapped protective sleeve 3 outside the said enamelled wire 2, the lead-out wire 4 at said enamelled wire 2 two ends is positioned at the two ends or the same end of instrument transformer 5, and two kinds of lead-out modes make the utility model instrument transformer can be applied under all kinds of environment easily;

A kind of plastic form Luo-coil instrument transformer of the utility model, the method for measurement during use is:

Instrument transformer more than 5 circles are wrapped on the measured conductor 6, and instrument transformer 5 and measured conductor 6 closely contact mutually; Simultaneously, can keep twining shape after adopting metal skeleton 1 to make instrument transformer 5 twine, and flexible back bone that can be conventional mutually is such, because of vibrations or rock loose change shape;

The mode that adopts many circles to twine makes under the prerequisite that does not increase instrument transformer circle footpath, has increased the coiling number of turn of enamelled wire coil greatly; And enclose on the instrument transformer of formula in one of routine, increase the number of turn, must increase the circle footpath of instrument transformer, and in case the increase circle directly, certainly will make the gap between instrument transformer and the measured conductor increase, thereby influence certainty of measurement; The utility model adopts the mode of many circles coiling, has perfectly solved this difficult problem, has improved certainty of measurement greatly; And behind employing the utility model, because the utility model volume is less, its minimum diameter only has 2.5mm, thereby its measurable minimum measured conductor can be to diameter 3mm, thereby measures range of application and improve greatly.

Claims

1. plastic form Luo-coil instrument transformer; Said instrument transformer (5) includes skeleton (1); It is characterized in that: said skeleton (1) is gone up spiral and is wound with enamelled wire (2), and said enamelled wire (2) is wound with one or more layers, the outer protective sleeve (3) that wrapped of said enamelled wire (2).

2. a kind of according to claim 1 plastic form Luo-coil instrument transformer, said skeleton (1) is a metal material.

3. a kind of according to claim 1 or claim 2 plastic form Luo-coil instrument transformer is characterized in that: the lead-out wire (4) at said enamelled wire (2) two ends is positioned at the two ends or the same end of instrument transformer (5).

4. a kind of according to claim 1 or claim 2 plastic form Luo-coil instrument transformer is characterized in that: said skeleton (1) is copper core cable, aluminium cable line, copper cash, aluminum steel or alloy wire.

5. like the said a kind of plastic form Luo-coil instrument transformer of claim 3, it is characterized in that: said skeleton (1) is copper core cable, aluminium cable line, copper cash, aluminum steel or alloy wire.